diff --git a/pkgs/tools/graphics/graphviz/2.0.nix b/pkgs/tools/graphics/graphviz/2.0.nix
index 04fff8053819..263a3d965f84 100644
--- a/pkgs/tools/graphics/graphviz/2.0.nix
+++ b/pkgs/tools/graphics/graphviz/2.0.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
       "--with-jpegincludedir=${libjpeg}/include"
       "--with-jpeglibdir=${libjpeg}/lib"
       "--with-expatincludedir=${expat}/include"
-      "--with-expatlibdir=${expat}/lib"
+      "--with-expatlibdir=${expat.out}/lib"
     ]
     ++ stdenv.lib.optional (xlibsWrapper == null) "--without-x";
 
diff --git a/pkgs/tools/graphics/graphviz/2.32.nix b/pkgs/tools/graphics/graphviz/2.32.nix
index 6eb8b5bceb2e..c8da74d02226 100644
--- a/pkgs/tools/graphics/graphviz/2.32.nix
+++ b/pkgs/tools/graphics/graphviz/2.32.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
       "--with-jpegincludedir=${libjpeg}/include"
       "--with-jpeglibdir=${libjpeg}/lib"
       "--with-expatincludedir=${expat}/include"
-      "--with-expatlibdir=${expat}/lib"
+      "--with-expatlibdir=${expat.out}/lib"
       "--with-cgraph=no"
       "--with-sparse=no"
     ]